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D( y )
y-42 = 0
y-42 = 0
y-42 = 0
y-42 = 0 // + 42
y = 42
y in (-oo:42) U (42:+oo)
1.14444 = y/(y-42) // - y/(y-42)
1.14444-(y/(y-42)) = 0
(-1*y)/(y-42)+1.14444 = 0
(-1*y)/(y-42)+(1.14444*(y-42))/(y-42) = 0
1.14444*(y-42)-1*y = 0
0.14444*y-48.06648 = 0
(0.14444*y-48.06648)/(y-42) = 0
(0.14444*y-48.06648)/(y-42) = 0 // * y-42
0.14444*y-48.06648 = 0
0.14444*y-48.06648 = 0 // + 48.06648
0.14444*y = 48.06648 // : 0.14444
y = 48.06648/0.14444
y = 332.77817779
y = 332.77817779
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